Xiao Sen, Yang Jikuang, Crandall Jeff R
School of Mechanical Engineering, Hebei University of Technology, Tianjin, China.
The State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, China.
Acta Bioeng Biomech. 2017;19(3):53-62.
The purpose of this quantitative study is to investigate the differences of the injury mechanism caused by two different types of seatbelt loads on the occupant's chest.
The finite element analysis is employed to compare the different responses of the human body model, including comparison of kinematics, chest accelerations, seatbelt forces and chest injury outcomes regarding chest deflections and rib fractures.
The calculated rib strain-stress response from simulations in force-limiting seatbelt are higher than that in the regular seatbelt. The forward movement and torso twist are both great in simulations with force-limiting seatbelt. Moreover, there are obvious differences in the injury outcomes of chest deflections and rib fracture risks under the different seatbelt loads.
Results indicate that the chest deflections and rib fracture risks are negatively correlated under the load of the force-limiting seatbelt, However, they are positively correlated to and determined by the seatbelt peak load of the regular seatbelt. This paper can provide a reference for study of the chest injury mechanism and protection efficiency of seatbelt.
本定量研究旨在探讨两种不同类型安全带负荷对乘员胸部造成的损伤机制差异。
采用有限元分析比较人体模型的不同反应，包括运动学、胸部加速度、安全带力以及胸部变形和肋骨骨折方面的胸部损伤结果的比较。
力限制型安全带模拟计算得出的肋骨应变-应力反应高于普通安全带。在力限制型安全带模拟中，向前运动和躯干扭转都很大。此外，不同安全带负荷下胸部变形的损伤结果和肋骨骨折风险存在明显差异。
结果表明，在力限制型安全带负荷下，胸部变形和肋骨骨折风险呈负相关，然而，它们与普通安全带的安全带峰值负荷呈正相关且由其决定。本文可为研究胸部损伤机制及安全带保护效率提供参考。
